Measurements of Frequencies of Solar Oscillations from the
MDI medium-l Program

Fig. 10: Inversion results. Relative differences between the squared sound speed in the Sun and a
standard solar model as inferred from inversions of the frequency
estimates computed with the mean-multiplet method (red) and the
averaged-spectrum method (blue) from the MDI Medium-l data. The
horizontal bars show the spatial resolution of the inferred values,
while the vertical bars are the formal error estimates.